Source : Webster's Revised Unabridged Dictionary (1913)

Encenia \En*ce"ni*a\, n. pl. [LL. encaenia, fr. Gr. ? a feast of
   dedication; ? in + ? new.]
   A festival commemorative of the founding of a city or the
   consecration of a church; also, the ceremonies (as at Oxford
   and Cambridge, England) commemorative of founders or
   benefactors.